Study of Medium Energy Heavy Ion Reactions with Quantum Mechanical Simulations

中能重离子反应的量子力学模拟研究

• 批准号: 05640343
• 负责人: HORIUCHI Hisashi
• 金额: $ 1.22万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05640343/
• 关键词: AMD; Flow; Multistep process; DELTA prticle; Projectile fragment; EOS; クラスターのフロー; 前平衡過程; バランス・エネルギー; 中高エネルギー重イオン核反応; 微視的シミュレーション

1. Study of momentum distribution of projectile fragments : By incorporating nucleon-cluster collision process, we could reproduce momentum distribution of projectile fragments in the Fermi energy region which looks like obeying the projectile-spectator model.2. Study of flow of nucleons and fragments : Flow of uncleons and fragments in ^<12>C+^<12>C and ^<40>Ar+^<27>Al was studied by the use of the Gogny force which is soft and the SKG2 force which is stiff. The former reproduces data well while the latter does not. The calculated results depend only weakly on the in-medium NN cross sections. Theory reproduced the observed tendency that larger fragments have larger flow. The coalescence mechanism is more important in ^<40>Ar+^<27>Al than in ^<12>C+^<12>C.3. Study of proton inelastic scattering at medium energies : Double differential cross sections of inelastically scattered protons at medium energies in p+^<12>C and p+^<58>Ni were reproduced well with AMD.4. Inclusion of DELTA degrees of freedom into the AMD theory : AMD computer code including DELTA degrees of freedom was constructed. p+^<12>C inelastic scattering at 800 MeV was studied successfully with the new code.

1.抛射碎片动量分布的研究：通过引入核子-团簇碰撞过程，我们可以再现抛射碎片在费米能区的动量分布，看起来符合抛射-旁观者模型。核子和碎片流动的研究：用软的Gogny力和硬的SKG2力研究了^&lt；12&gt；C+^&lt；12&gt；C和^&lt；40&gt；Ar+^&lt；27&gt；Al中的非整子和碎片的流动。前者能很好地复制数据，而后者则不能。计算结果与介质中神经网络的截面关系不大。理论再现了观察到的较大碎片有较大流动的趋势。聚结机制在Al中的作用比在C中更重要。中能质子非弹性散射的研究：用AMD很好地再现了p+^&lt；12&gt；C和p+^&lt；58&gt；Ni中能质子非弹性散射的双微分截面。将Delta自由度纳入AMD理论：构建了包含Delta自由度的AMD计算机程序。用新程序成功地研究了800 MeV的P+^&lt；12&gt；C非弹性散射。

项目成果

H.Horiuchi: "Neutron-Rich Nuclei Studied with AMD" Zeitschrift fiir Physik A. 349. 279-283 (1994)

H.Horiuchi：“用 AMD 研究富中子核”Zeitschrift fiir Physik A. 349. 279-283 (1994)

A.Wierling: "Antisymmetrization of a Mean Field Calculation of the T-matrix" Zeitschrift fiir Physik A. 348. 153-168 (1994)

A.Wierling：“T 矩阵平均场计算的反对称”Zeitschrift fiir Physik A. 348. 153-168 (1994)

A.Ono: ""Flow of Nucleons and Fragments in ^<40>Ar + ^<27>Al Collisions Studied with AMD"" Physical Review C. 51. 299-309 (1995)

A.Ono：“用 AMD 研究的 ^<40>Ar ^<27>Al 碰撞中的核子和碎片流”物理评论 C. 51. 299-309 (1995)

H.Horiuchi: "Molecular Dynamics Model of Heavy Ion Collisions at Medium Energies" Nuclear Physics. A583. 297-304 (1995)

H.Horiuchi：“中等能量重离子碰撞的分子动力学模型”核物理。

A.Ono: "Flow of Nucleons and Fragments in ^<40>Ar+^<27>Al Collisions" Physical Review C. 51. 299-309 (1995)

A.Ono：“^<40>Ar ^<27>Al 碰撞中的核子和碎片流”物理评论 C. 51. 299-309 (1995)